Great read fellows:
http://jcem.endojournals.org/content/94/12/4665.full
In summary, whereas the concept of using an aromatase blocker to enhance endogenous testosterone production was an attractive one, it does not appear to be a viable approach for preventing age-related declines in bone mass or in improving parameters of body composition in men. These findings also suggest that as males, we should perhaps be just as interested in our estradiol levels as we seem to be in our testosterone levels, if not more so. For many reasons, however, such a dramatic change in focus seems unlikely.